Lämpötilankorjaus

Lämpötilankorjaus, known in English as temperature correction, is a process used to adjust measurements or data that are affected by temperature variations. Many physical properties, such as volume, density, pressure, and electrical resistance, change predictably with temperature. Lämpötilankorjaus aims to remove or compensate for these temperature-induced changes to provide a value that reflects the property at a standard or reference temperature.

This correction is crucial in various fields, including metrology, manufacturing, and scientific research. For instance, in the precise measurement of liquids, volume changes significantly with temperature. A calibrated measuring cylinder will have a stated volume at a specific temperature, usually 20 degrees Celsius. If the liquid or the measuring device is at a different temperature, a lämpötilankorjaus must be applied to determine the true volume. Similarly, in electrical measurements, the resistance of conductors varies with temperature, and this needs to be accounted for to ensure accurate readings.

The specific method for lämpötilankorjaus depends on the property being measured and the material involved. It typically involves using known thermal expansion coefficients or resistance-temperature relationships. Mathematical formulas are applied to the measured value and the observed temperature to calculate the corrected value at the reference temperature. This ensures consistency and comparability of measurements across different environmental conditions.